Mitsubishi Electric MELSEC Q Series Structured Programming Manual page 74

(4) Applying index settings to extended data registers (D) and extended link registers (W)
(for Universal model QCPU (excluding Q00UJCPU), and LCPU)
As an index setting can be applied to internal user devices, data registers (D) and link
registers (W), the device specification by the index setting can be used within the range of
extended data registers (D) and extended link registers (W).
User program
4.6 Index Setting
4-50
User program
MOV
EN ENO
s
1234
MOV
EN ENO
s
1234
1) Index settings that cross internal user devices and extended data registers (D)/
extended link registers (W)
An index setting that crosses internal user devices and extended data registers
(D)/extended link registers (W) cannot be applied. If the device range check is
enabled at the index setting, an error occurs. (Error code: 4101)
The index setting applied to
the internal user device
MOV
EN ENO
s d
1234
The index setting that crosses
internal user device and extended
data register cannot be applied.
The index setting applied to
the internal user device
Z0 = 0
d
D100Z0
Z0 = 1000
Z1 = 0
d
D20000Z1
Z1 = 2000
The index setting applied to
the extended data register
Z0=0
D100Z0
Z0=20000
D device image
D100
D1100
D20000
D22000
D device image
D100
Internal user device
D20100
Extended data register
Internal user
device
Extended data
register